Glass beads are a kind of inorganic lightener material with low density and high strength. They can be used to prepare lightweight cement composite and significantly improve traditional cement materials' fluidity, compressive, and flexural properties after setting. In this paper, a new lightweight cementitious hole sealing material was prepared by utilizing the excellent properties of glass beads, and the new lightweight cementitious composite drilled hole sealing material was quantitatively and qualitatively analyzed by flow test, uniaxial compression, nuclear magnetic resonance, and SEM experiments, to derive the effects of the substitution of different types of glass beads with different proportions of different types of glass beads on the material's fluidity, compressive strength, pore distribution, and microstructure. The results show that the new cementitious materials have better fluidity, in which the fluidity of the optimal group is increased by 8 % compared with that of pure cement mortar; the mechanical properties of the optimal group are significantly improved with the hollow glass beads acting as the aggregate, and the peak stress reaches 55.025 MPa; the peak stress can reach 60.191 MPa with the use of modified hollow glass beads acting as the aggregate; moreover, with the incorporation of hollow glass beads, the material is more compact, and the pore distribution and microstructure of the material is improved. In addition, with the incorporation of hollow glass beads, the densification of the material showed a trend of first enhancement and then a gradual decrease, while the densification of the material weakened after the incorporation of solid glass beads. Therefore, hollow glass beads are more suitable for improving and optimizing cementitious sealing materials. The research and development of this material are conducive to improving cementitious materials' sustainability and alleviating the cement production's environmental burden. At the same time, it provides a reference for the research and development of new high-quality cementitious materials.

中文翻译：

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以玻璃微珠为填料的新型轻质水泥基复合材料性能研究

玻璃珠是一种低密度、高强度的无机轻质材料。它们可用于制备轻质水泥复合材料，并显着改善传统水泥材料凝固后的流动性、压缩性和弯曲性能。本文利用玻璃珠的优良性能制备了一种新型轻质水泥基复合钻孔封孔材料，并通过流动试验、单轴压缩、核磁共振、扫描电镜对新型轻质水泥基复合钻孔封孔材料进行了定量和定性分析。通过实验，得出不同类型玻璃微珠不同比例替代不同类型玻璃微珠对材料流动性、抗压强度、孔隙分布和微观结构的影响。结果表明，新型胶凝材料具有更好的流动性，其中优化组的流动性比纯水泥砂浆提高了8%；以空心玻璃微珠为骨料时，优化组力学性能显着提高，峰值应力达到55.025 MPa；采用改性空心玻璃珠作为骨料，峰值应力可达60.191 MPa；而且空心玻璃珠的掺入使材料更加致密，改善了材料的孔隙分布和微观结构。此外，随着空心玻璃微珠的掺入，材料的致密化呈现出先增强后逐渐下降的趋势，而掺入实心玻璃微珠后材料的致密化则减弱。因此，空心玻璃微珠更适合用于改进和优化水泥基密封材料。该材料的研发有利于提高胶凝材料的可持续性，减轻水泥生产的环境负担。同时为新型优质胶凝材料的研发提供参考。